#include <stdio.h>
int main(int argc, char const *argv[])
{
    int a[3][4] = {0};
    for (int i = 0; i < 3; i++)
    {
        for (int j = 0; j < 4; j++)
        {
            printf("请输入a[%d][%d]元素的值:", i, j);
            scanf("%d", &a[i][j]);
        }
    }
    printf("数组内容为>:\n");
    for (int i = 0; i < 3; i++)
    {
        for (int j = 0; j < 4; j++)
        {
            printf("%d ", a[i][j]);
        }
        printf("\n");
    }
    return 0;
}